What style of helmet pre-dated the distinctive design used by the German army, a pin of which was given to First World War veterans by the Nazi Party? 
boiled leather Pickelhaube
-1
Section::::Abstract.
Steel Helmet Veterans Memorial Badge
40855160
-1
Section::::Abstract.
Stahlhelm
864145
-1
Section::::Abstract.
Stahlhelm
864145
-1
Section::::Abstract.
Stahlhelm
864145